Fuel-saving device for stoves, ranges, ovens, and the like



' July 6, 192

F. ALLENDORF FUEL SAYING DEVICE FOR STOVES RANGES,

OVENS, AND THE LIKE Filed March 14. 1924 Patented July 6,

NI EDMST PATEN JACOB ROSENBERG,

, FUEL-SAVING nnvrcnnonsrovns, Barrens, ovnns nnn Tran 11am Application filed March 14, 1924, Serial noissaam and. in Germany March 16 ,'1 9 23. I

This invention relates to a fuel saving devlce for use in stoves, kitchen ranges or like heating devices" using solid fuel, and.

its purposeis to save fuel by the use of the 6 fuel saving device in the fireplace or grate,

in order to reduce the existing combustion space and cause a gasification ofthe fuel .when sufficient heat has been produced, and

container is constituted by the grate and the front by the fire door, if such exists.

(In order that the invention may be more readily understood reference will be made to 5 the accompanying drawing illustrating, way of example, one form of constructlon thereof Figure '.1 is a perspective view of the device, and

Fig. 2 is a like vlew of a modification. A i

The device is constituted by two side walls a and b, a rear walla. and a slidablecover plate d, all said parts being made; of refractory material. The cover or top plate d may be replaced by any other ,form of cover. vThe bottom is formed "by thee Xisting fire gratee. The side walls a and b and the rear wall a are provided with slots, per forations or nozzle-shaped openings f for the passage of air. If desired such perforations or nozzle shaped openings may also be prov vided in'the sliding cover d in orderto i to form an exit opening forthe products of increase the air supply. Each wall a and b is provided at its upper end with'parallel projections forming a groove 9' in which the slide 7 is guided; the latter -mayadvan-' tageously be providedwith an appropriate locking device (not shown) toprevent its accidental displacement during supply of fuel to the grate within the space formed ,7

by the walls a'bc:d. p

1 The slide (Z is cut away atthe front at h combustion and has a knob i for engagement by a hook orthe like in order to, move it in or out. The cut-away portion is provided 'so that a pot or the like may be heated by 'direct'fiame when the slide (Z is closed. y V

' and enables In the event of the existing combustion is leftbehind the rearwall 0,. an auxiliary space being sollargethat itoo greata space unperforated verticalwall or falseiback' 7c i may be provided at such a distance from the wallcthat anarrow channel is formed between them. i v

The slide closed whenvth e ignition temperature is reached andthe combustion gases there formed'are ignited by the'air entering through the a wall openings and burne-d, which kee'ps'up' the further fuel gasification f 1 a complete utilization of the ue Y The whole device can be easily adapted to] anyexisting'or desired*- size of range or stove, and may alsobe provided withldouble walls, as 1n Flg. 2,111 which case the space i between thesewallsfgZ-m and bm may. serve as an air-supplyand preheating channel. If desired, the combustion air may be supplied by means of a blower y or the like.

What I. claim is:' f V 1. A fuel saving device for stoves, or fireplaces comprising an openpfronted box-like structure consisting of three perforated walls of refractory materialadapted to beplaced upon the grateofan existing stove, and a cover plate slidable in the upper ends "of the I two", side walls, scribed 1 I p 2. A fuel sa-ving device for I places'jcomprising an. open fronted box-like structure consisting of threelperforated' walls of refractory material adapted to be placed upon the grate of an existing stove and a perforated cover plate with a semi-circular cut-away portion, slidable in the upper ends of thetwo side walls substantially as described.

3. A fuel saving fireplace or stove com prising a grate, an open fronted box-like structure consisting of three perforated walls of refractory material adaptedto be'p'laced upon the. grate of anfexisting'stove, and a substantially as destoves, or firecover. plate slidable in the upper ends of the two side walls and an unperforated vertical wall behind the rearwall of the boxwalls of refractory materi"ah-adapted to be placed upon the grate of an existing stove,

a cover plate slidable in the upper ,ends' of the we sidewalls and a mew'ito supply like eornprisingani open fronted box-like structure consisting of perforated .walis for resting With their lower edges on the grate of a stove andthe' like; anoi a nioi able c'o v er' having an opening for the gases generated in' said box.

V .6. A fuel savingdevice for sto esand-the like comp riising an open-fronted "hox iike istrn etiire; s'aid open, front arranged to" be closed by the door of the stove in Which'the device is placed ancieonsfisting of three vjertidal double Walls, each wall having perfo'rations between the space therein and the interiorof said box, and a remo'vableeover forsaid Walls, having an opening therein .for the products of combustion, whereby combustion air Will pass through the grate between said donblewalls and be preheated before p'assing'throiigh the perforations into the interior of said device.

p In testimony that' l claim the foregoing y itieml. ha e g e my am I FRIEDRICH ALLENDGBF. I 

